1. School of Safety Science and Engineering, Xi’an University of Science and Technology, 58 Yanta Middle Road, Xi’an 710054, China
2. Shaanxi Key Laboratory of Prevention and Control of Coal Fire, Xi’an University of Science and Technology, Xi’an 710054, China
3. Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Land and Resources, Xi’an 710021, China